/* ZB.MOM.WW.Theme — side-rail + login layout
   Tokens live in theme.css; this sheet carries only layout + the side rail. */

/* ── App shell: side rail + page ─────────────────────────────────────────── */
/* The shell is a native <details> disclosure so the narrow-viewport hamburger
   toggle works with NO JavaScript (no Bootstrap collapse bundle): below lg the
   <summary> hamburger opens/closes the rail; on lg+ the rail is force-shown
   regardless of the open state (see the lg media query below). The outer flex
   direction is supplied by Bootstrap utilities on the wrapper
   (`d-flex flex-column flex-lg-row`) so the hamburger row stacks above the rail
   on <lg viewports and the rail sits beside the page on lg+. */
.app-shell {
    align-items: stretch;
    min-height: calc(100vh - 3.3rem);
}

.app-shell .page {
    flex: 1;
    min-width: 0;
}

/* Hamburger <summary>: hide the native disclosure triangle so it reads as a
   plain button (the styling comes from the Bootstrap .btn utilities). */
.app-shell > summary.rail-toggle {
    list-style: none;
    cursor: pointer;
}
.app-shell > summary.rail-toggle::-webkit-details-marker { display: none; }

/* Below lg the native <details> shows/hides #theme-rail via [open]; nothing
   extra is needed there. On lg+ we force the rail visible (see media query)
   and keep the toggle hidden via Bootstrap's d-lg-none. */

/* ── Side rail ───────────────────────────────────────────────────────────── */
.side-rail {
    width: 220px;
    flex: 0 0 220px;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    padding: 1rem 0.7rem;
    background: var(--card);
    border-right: 1px solid var(--rule-strong);
}

/* On lg+ keep the side rail pinned so it stays visible when content scrolls,
   and force it shown regardless of the <details> open state (the hamburger
   toggle is hidden at this width). */
@media (min-width: 992px) {
    /* Chromium >=121 wraps a <details>'s content in a generated ::details-content
       box that carries content-visibility:hidden while the <details> is closed.
       Because our app-shell ships closed by default (SSR, no JS) and the toggle
       is d-lg-none here, that wrapper would (a) hide the rail+page entirely on
       lg+ and (b) sit between .app-shell and its rail/page children, collapsing
       the flex-lg-row layout into a vertical stack. Dissolving the wrapper with
       display:contents removes its box (so content-visibility no longer hides the
       content AND rail/page become direct flex children of .app-shell again).
       Browsers that don't support ::details-content treat this as an invalid
       selector and drop the rule, falling back to the legacy force-show below. */
    .app-shell::details-content {
        display: contents;
    }

    #theme-rail {
        display: block;
        position: sticky;
        top: 0;
        height: 100vh;
        align-self: flex-start;
        z-index: 1020;
    }
}

/* When the side rail is collapsed under <lg viewports (the <details> is closed)
   the native disclosure hides #theme-rail; when open, restore full width on
   mobile so the rail spans the viewport. */
@media (max-width: 991.98px) {
    .side-rail {
        width: 100%;
        min-width: 100%;
        max-width: 100%;
        height: auto;
    }
}

/* Login card title. Replaces the panel-head top strip on the login page so the
   card reads as a self-contained sign-in form, not a tabbed panel. */
.login-title {
    margin: 0 0 1.1rem 0;
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--ink);
}

/* Brand block pinned at the top of the side rail. Mirrors ScadaLink's
   .sidebar .brand styling — used now that the top app-bar was dropped. */
.side-rail .brand {
    color: var(--ink);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 1rem;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 0.4rem;
}
.side-rail .brand .mark { color: var(--accent); }

/* Section eyebrow — the <summary> label of a NavRailSection. The collapse
   chevron is supplied by the `.rail-section > summary::before` rule below; this
   rule styles the uppercase eyebrow text itself. */
.rail-eyebrow-toggle {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    width: 100%;
    background: transparent;
    border: 0;
    text-align: left;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--ink-faint);
    padding: 0.45rem 0.6rem 0.3rem;
    cursor: pointer;
}
.rail-eyebrow-toggle:hover { color: var(--ink); }
.rail-section-body {
    display: flex;
    flex-direction: column;
}

.rail-link {
    display: block;
    padding: 0.4rem 0.6rem;
    border-radius: 4px;
    border-left: 2px solid transparent;
    font-size: 0.86rem;
    color: var(--ink-soft);
}
.rail-link:hover {
    background: var(--hover-bg);
    color: var(--ink);
    text-decoration: none;
}
.rail-link.active {
    background: var(--active-bg);
    border-left-color: var(--accent);
    color: var(--accent-deep);
    font-weight: 600;
}

/* Optional leading icon inside a rail link (NavRailItem's Icon slot). Sizes and
   aligns the icon and gives it a gap from the label text. */
.rail-ico {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1rem;
    margin-right: 0.4rem;
    color: var(--ink-faint);
}

/* ── Session block, pinned to the rail foot ──────────────────────────────── */
.rail-foot {
    margin-top: auto;
    padding-top: 0.6rem;
    border-top: 1px solid var(--rule);
}
.rail-user {
    display: block;
    padding: 0 0.6rem;
    font-weight: 600;
    font-size: 0.88rem;
}
.rail-roles {
    padding: 0.1rem 0.6rem 0.5rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink-faint);
}
.rail-btn {
    display: inline-block;
    margin: 0 0.6rem;
    padding: 0.3rem 0.7rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--ink-soft);
    background: var(--card);
    border: 1px solid var(--rule-strong);
    border-radius: 4px;
    cursor: pointer;
}
.rail-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    text-decoration: none;
}

/* ── Login card centring ─────────────────────────────────────────────────── */
.login-wrap {
    max-width: 380px;
    margin: 3.5rem auto 0;
}

/* details-based collapsible nav section (no JS / no rendermode coupling) */
.rail-section { }
.rail-section > summary { list-style: none; cursor: pointer; }
.rail-section > summary::-webkit-details-marker { display: none; }
.rail-section > summary::before { content: '\25B6'; font-size: 0.55rem; color: var(--ink-faint); margin-right: 0.4rem; }
.rail-section[open] > summary::before { content: '\25BC'; }
/* Hide a collapsed section's items explicitly. The browser's built-in
   <details> content-hiding (::details-content content-visibility:hidden) is
   unreliable once an interactive framework (e.g. Blazor InteractiveServer)
   owns/re-renders the native <details> — a closed section can otherwise keep
   showing its items under a "collapsed" chevron. An explicit display:none makes
   the visual collapse work across all render modes (kit issue #6). */
.rail-section:not([open]) > .rail-section-body { display: none; }

/* StatusPill: info variant (on-palette, reuses the info blue wash) */
.chip-info { color: var(--accent-deep); background: var(--info-bg); border-color: var(--info-border); }

/* TechCard body/footer padding; TechField error; LoginCard body */
.panel-body { padding: 0.85rem 0.9rem; }
.panel-foot { padding: 0.6rem 0.9rem; border-top: 1px solid var(--rule); }
.login-body { padding: 1.4rem 1.1rem 1.25rem; }
.login-error { margin-bottom: 0.85rem; }
.field-error { font-size: 0.78rem; margin-top: 0.2rem; }
